Validity of the interval method for the determination of the anisotropy factor of high dose rate 192IR sources

Sang Hyun Cho; Renate Muller-Runkel

doi:10.1016/S0360-3016(96)00509-3

Validity of the interval method for the determination of the anisotropy factor of high dose rate ¹⁹²IR sources

Sang Hyun Cho, Renate Muller-Runkel

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Purpose: This study investigates the validity of the interval method to determine the anisotropy factors of high dose rate (HDR) ¹⁹²Ir sources. Methods and Materials: A calculation method, which is one of the various numerical implementations of the Sievert integral and known as the interval method, is applied to determine the anisotropy factors of a HDR ¹⁹²Ir source. Calculated results from r = 1 cm to 10 cm are compared to published data. Results: The comparison shows that the error resulting from the interval method increases from 1.3 to 28.1% as the radial distance increases from r = 1 cm to 10 cm and is significantly smaller than that previously reported. Conclusions: The interval method might be considered as a method that provides a very rough estimate of the anisotropy of HDR ¹⁹²Ir sources whenever no conclusive anisotropy data is available.

Original language	English (US)
Pages (from-to)	483-487
Number of pages	5
Journal	International Journal of Radiation Oncology Biology Physics
Volume	37
Issue number	2
DOIs	https://doi.org/10.1016/S0360-3016(96)00509-3
State	Published - Jan 15 1997
Externally published	Yes

Keywords

Anisotropy factor
High dose rate Ir source
Interval method
Sievert integral

ASJC Scopus subject areas

Radiation
Oncology
Radiology Nuclear Medicine and imaging
Cancer Research

Access to Document

10.1016/S0360-3016(96)00509-3

Cite this

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title = "Validity of the interval method for the determination of the anisotropy factor of high dose rate 192IR sources",

abstract = "Purpose: This study investigates the validity of the interval method to determine the anisotropy factors of high dose rate (HDR) 192Ir sources. Methods and Materials: A calculation method, which is one of the various numerical implementations of the Sievert integral and known as the interval method, is applied to determine the anisotropy factors of a HDR 192Ir source. Calculated results from r = 1 cm to 10 cm are compared to published data. Results: The comparison shows that the error resulting from the interval method increases from 1.3 to 28.1% as the radial distance increases from r = 1 cm to 10 cm and is significantly smaller than that previously reported. Conclusions: The interval method might be considered as a method that provides a very rough estimate of the anisotropy of HDR 192Ir sources whenever no conclusive anisotropy data is available.",

keywords = "Anisotropy factor, High dose rate Ir source, Interval method, Sievert integral",

author = "Cho, {Sang Hyun} and Renate Muller-Runkel",

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T1 - Validity of the interval method for the determination of the anisotropy factor of high dose rate 192IR sources

AU - Cho, Sang Hyun

AU - Muller-Runkel, Renate

PY - 1997/1/15

Y1 - 1997/1/15

N2 - Purpose: This study investigates the validity of the interval method to determine the anisotropy factors of high dose rate (HDR) 192Ir sources. Methods and Materials: A calculation method, which is one of the various numerical implementations of the Sievert integral and known as the interval method, is applied to determine the anisotropy factors of a HDR 192Ir source. Calculated results from r = 1 cm to 10 cm are compared to published data. Results: The comparison shows that the error resulting from the interval method increases from 1.3 to 28.1% as the radial distance increases from r = 1 cm to 10 cm and is significantly smaller than that previously reported. Conclusions: The interval method might be considered as a method that provides a very rough estimate of the anisotropy of HDR 192Ir sources whenever no conclusive anisotropy data is available.

AB - Purpose: This study investigates the validity of the interval method to determine the anisotropy factors of high dose rate (HDR) 192Ir sources. Methods and Materials: A calculation method, which is one of the various numerical implementations of the Sievert integral and known as the interval method, is applied to determine the anisotropy factors of a HDR 192Ir source. Calculated results from r = 1 cm to 10 cm are compared to published data. Results: The comparison shows that the error resulting from the interval method increases from 1.3 to 28.1% as the radial distance increases from r = 1 cm to 10 cm and is significantly smaller than that previously reported. Conclusions: The interval method might be considered as a method that provides a very rough estimate of the anisotropy of HDR 192Ir sources whenever no conclusive anisotropy data is available.

KW - Anisotropy factor

KW - High dose rate Ir source

KW - Interval method

KW - Sievert integral

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